Molding-machine.



LBARKER. y HOLDING MACHINE.

APPLICATION FILED .TAN.11, 1910.

988,922. vPateniuiad lApr.'4, 1.911. n

4 SHEETS-SHEET 4 -fnx minus mln ce., wdsunlgmm, n. c.

UNITED STATES PATENT OFFICE.

JAMES BAKKER, 0F PHILADELPHIA, PENNSYLVANIA.

MOLDING-MACHINE.

To all whom it may concern:

Be itknown that I, JAMES BAKKER, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Molding-Machines, vof which the following is a specification.

l My invention relates to certain improvements in molding machines, in which the pattern part is carried by a platform pivotally mounted on standards, so that when the sand is rammed in the flask, the flask and niold can be bodily inverted, after which the parts are detached and the mold withdrawn from the pattern.

The main object of the present invention is to perfect the construction of this type of machine and to utilize air under pressure 'for actuating the mechanism.

A further object of the invention is to provide a suitable support for the flask so that it will always'draw properly from the pattern..

In the accompanying drawings :-Figure 1, is, a perspective view of my improved molding machine showing the flask removed from the pattern; Fig. 2, is a perspective vview showing the. pattern returned to its first position and the mold ready to be removed from the machine; Fig. 3, is a side view ofmy improved molding machine with thepattern and mold removed; Fi 4t, is a longitudinal 'sectional view on the ine lr-4 Fig. '5; Fig. 5, is an end view; Fig. 6, is a 'sectional Vperspective view of the cylinder. FigS, 7 vand 8.are detached sectional views ofthe supporting bar; Fig. 9, is a perspective view ofthe 'table lever and supporting bar; Fig. 10, is a sectional view on the line 1Q-10, Fig. 4; Fig. 11, is a view of a modification; and Fig. 12, is a plan view showing 1 ttwo machines carrying a single flask.

` Ais the frame of the molding machine having a standard A in which is mounted afshaft B; secured to this shaft is the sup-- porting arm or rock over B for the pattern carrier C, which can be secured tothe larm in any suitable manner. This carrier -consists in the present instance of the board c ,and flask c which may be of any form desired.

Thetarm VB', as shown in Fig. 1, in thev A present instance consists of two members 6,6 and la' plate Zi to which the pattern carrier C is secured by cleats b2. Projecting from the frame is an upright a in which is an adjustable stud a for limiting the down- Speccation of Letters Patent.

:Application filed January 11, 1910.

Patented Apr. 4,1911.

Serial No. 537,552.

ward movement of the arm B when in its first position.

Secured to an arm B2 on the shaft B is a rod ci of a piston CZ which is mounted in a cylinder D, this rod being connected at d2 to the arm B2 by a swivel joint. The cylinder D is pivoted at cl3 to bearings g secured to the frame A, so that the cylinder will accommodate itself to the movement of the arm as it shifts the arm carrying the pattern and the flask from the position shown in Fig. 4, to the position shown in Fig. 1. The cylinder has a'stufling box d* and a wiping box d5 for wiping off any sand or grit which may adhere to the rod before it reaches the boX.

The pattern carrier or match flask C, I have shown as made of metal, out it will be understood that it may be made of wood or any suitable material without departing 4from the invention, and the flask E may also be made of wood or metal.

The lla-sk E is coupled to the pattern support by suitable clamps, so that when the flask is properly rammed it can be inverted and the two parts carried to t-he position illustrated in Fig. 1, after which the clamps are removed and the rammed flask can be withdrawn from the pattern.

An air pipe f connects the cylinder D with the main air supply pipe F which is coupled to any suitable air pressure device.

,f is a valve for regulating the amount of air passing through the pipe f, and f2 is a valve for controlling the flow of air through the pipe, and connected to this pipe is an escape pipe f3 having a pet cock f* which can be regulated so as to allow a certain amount of air to escape when the valve f2 is turned to a given position, so that on operating the valve f2 the air in the cylinder D will throw the arm B over and by shifting the valve the air will escape through the small openings in the pipe f3 and the flask and pattern will settle slowly onto the movable ask supporting frame. By shifting the valve again the arm can be returned to its normal position, again settling by the escape of the air through the pipe f3.

I is a vertically movable supporting table for the flask after it is withdrawn from the pattern. This table consists of two arms I', a cross member I2 and an uprightv I3 on which are rollers z" adapted to travel in guides on the standards A of the machine.

I-I is a cylinder containing oil or other liquid and provided with a piston and piston rod h connected to a member I'1 projecting from the table I. This cylinder is connected by a pipe li to a pressure t-ank J, and in the pipe is a needle valve h2 having a handle h3 within easy reach of the operator, so that on turning the handle the oil can be held in the cylinder I-I. Secured to the arms I is a cross member I5 having an adjustable supporting stud 2, and pivoted at 7c to the arms I are weigh-ted arms K carrying a cross member K on which are two adjustable supports it for the flask.

The arms K are slotted as at 722 and adapted to the slots Vare spindles 7c3, 7c, and bearing against the faces of the arms are rictional washers of fiber or other material, which may be adjusted by means of nuts on the spindles. On the spindle 7a4 is a cylinder 705 in which is mounted a piston 76 carried by the other spindle 7c3; a pipe la7 for air under pressure leads from the valve m' to the cylinder 705. K2 is a spring coupled at each end to lever bars K3 fulcrumed on a rod K4, one bar bearing against the back of the cylinder 735 and the other against a collar 768 secured to the spindle 7c3 the lever bars K3 being mounted on the spindles ,7c3 and 7c* and the rod K4 being attached to the arms I or other suitable supports. When air enters the cylinder 765 it forces thebars apart against 'the pressure of the spring K2, but when the air is exhausted the spring draws the bars K3 toward each other, causing the Washers to clamp the arms K, hold- 'ing them in the position to which they are adjusted. In the present instance the arms K have hooks lo which enter openings i010 in the bar K, as shown in Figs. 6 and 9, so that the bar is free to adjust itself to the flask, and it will be noticed that the adjustable supports span the bar K and are held to it by 'the clamp block and that one support is arranged at right angles to the other, Fig. 9. The object of this construction is to allow the supports on the frame I to be automatically 'adjusted to the Ha'sk carried by the pattern support, so that no matter whether the pattern support is perfectly level or not there will be no jar when the flask is withdrawn from the pattern. This is essential to the perfect drawing of a flask j from a pattern.

' end of the pressure tank 1J. The 'upper half of this 'tank contains air under pressure and the lower half oil, the two being separated by a loose disk j, shown by dotted lines Fig. 15.

m is a valve for controlling the flow of air to the cylinder J and this valve is a three-way valve and has an escape `nozzle in the form of. a mulfler m. When the valve is turned in one position air under pressure is admitted to the upper portion of the tank J, and if the valve h2 in the pipe 7L is open, then oil under pressure will flow into the cylinder I-I and raise the support I,

By closing the valve h2 the oil is trapped in Athe cylinder and will hold the frame I in the position to which it is adjusted, then on turning the valve m so as to form communication between the exhaust muliler 'm/ and the tank J, and on opening the valve h2, the air escaping will release the oil in the cylinder H and allow the frame to lower by the weight of the parts.

A vibrator' n is placed on the arm B and connected to the air supply through a ilexible pipe a. Air is admitted to the vibrator by pressing down the lever n3 of the valve n2. This vibrator is set in motion as the mold is drawn from the pattern.

In order to prevent the re-bound of the arm carrying the pattern and flask when moving in either direction, I mount a ratchet wheel S on the shaft B and pivoted at s to a bearing on the frame A, Fig. 3, is a double pawl s', s2, having teeth which engage tlie teeth of the ratchet wheel S. On the end of the pivot of the pawl is a yoke frame carrying a bar s3 and adapted to slide on this bar is a loop 252 of a coiled spring z5 attached at t to the base.

Then the arm B is raised from the position shown in full lines in Figs. 3 and 4, to that shown in dotted lines in Fig. 4, the piston in the cylinder D moves the full length of the cylinder and then returns as the arm passes over the center and, in some instances, unless suitable means are provided for checking the arm, it may re-bound without going the full distance, but by securing the ratchet wheel S to the shaft and having the pawl s in action when the arm is moving from the position shown by full lines in Fig. 4:, to that 'shown by dotted lines, it is impossible for the arm to re-bound, and by shifting the spring t on the bar 83 when it is wished to return the armwith the pattern, the 4arm cannot re-bound on the return movement. The movement of the spring on the bar s3 throws one or other of the pawls in vengagement with the ratchet wheel. l

In Fig. 12, I have shown two machines arranged side by side, with a single flask E i carried by the supporting arms or rockovers B of each machine, andA these .machines may be operated independently or may be connected by one or more pipes F', so as to be operated from one system. By this arrangement very large molds can be made in a single flask which would be too vlarge .for one machine, but by arranging the machin-es Vclose together and preferably Acoi'ipling them, a single large flask can be read-ily handled.

The operation of' the machine is as follows The pattern carrier or match flask is 25 laiities in the position of the flask and botthe three parts together. T grilli@ Valve f2 is actuated so as to allow ai x nder pressure to enter the cylinder D; th' Spring being in the position illustrated? in lFig. 3, this causes the arm B to liftth pattern and flask and turn them a oneduarter turn and its own weight moves it to the' position illustrated by dotted lines in Fi 4;' tha air bgg-- ing forced out of the cylinder through the pet cock f4, which wire draws the air and allows it to settle slowly in position, A5 the flask and pattern board are thus Suspended the frame I is raised by operating the valve m, which allows air to pass into the tank J under pressure, which causes the liquid in the tank to pass into the cylinder H and lift the frame until its teariirg points 2 and la rest againstthe underside of the bottom board, and the levers Kautomatically move 'to accommodate themselves to any irregutom board; air being admitted to the cylinder 705 at the same time that air is admitted to the tank J, releasing the levers K. As soon as the valve m is turned to allow the air to exhaust for the tank J and cylinder fc5 the spring K2 is released and will clamp the levers K and hold them in the position to which they are adjusted. After which the cleats or clamps are removed so as to free the iiask from the pattern board and by operating the valve n2 the vibrator n is set in motion7 and then on opening the valve h2 oil is transferred from the cylinder H into the tank J and the frame I is lowered with the flask clear to the pattern board, and then by actuating the valve f2 and shifting the spring t to throw the pawl s2 into engagement with the ratchet wheel S the arm with the pattern board is returned to its rst position and the flask and bottom board can be removed from the machine.

In some instances I may use a rod u and handled nut u to clamp the levers K, as shown in Fig. 11, without departing from my invention, but I prefer to use the automatic clamps as described above.

AI claim 1- 1. The combination in a molding machine, of a frame, a shaft mounted on the frame, a pivoted arm carrying a pat-tern, an arm on the shaft, a pivotally mounted cylinder, a piston adapted to the cylinder and having a rod connected to the arm onthe shaft, and means for preventing the arms from rebounding when the shaft is moved forward.

2. The combination in a molding machine, of a frame, a shaft mounted on the frame, a pivoted arm carrying a pattern, an arm on the shaft, a pivotally mounted cylinder, a

piston adapted to the cylinder and having a rod connected to the arm on the shaft, and means for preventing the arm from re-bounding when the shaft is moved in either direction.

The combination in a molding machine, of a frame, a shaft, an arm carried by the shaft and .carrying the pattern, said shaft having a second arm, a cylinder pivoted to the frame, a piston, a rod connected to the piston and to the arm on the shaft, a ratchet wheel on the shaft, a double pawl, and means for shifting and yieldingly holding the pawls either in one position or the other.

4. The combination in a molding machine, of a liask carrier, a vertically adjustable frame for receiving the flask, means for raising the frame, a liquid cylinder having a piston connected to the frame, a tank communicating at the bottom with the cylinder and at the top with the air pressure supply, a valve for cutting off communication between the cylinder and tank, and means for admitting air to the tank or allowing it to escape therefrom.

5. rlhe combination in a molding machine, of a pivoted arm carrying the flask and pattern, a vertically adjustable frame for receiving the iiask, and means for raising the frame by air pressure and lowering it by the escape of liquid.

6. The combination in a molding machine, of a supporting frame, a flask, a liquid cylinder having a piston connected to the frame, a tank communicating at the bottom with the cylinder and at the top with an air pressure supply, a valve for cutting oit' communication between the cylinder and tank, and a three-way valve for admitting air to the tank and allowing air to escape therefrom when the valve is turned.

7. The combination in amolding machine, of a frame, a pivoted arm carrying the pattern, a pivoted cylinder for turning the said arm, a vertically movable frame adapted to receive the flask after it is detached from the pattern board, a vibrator for rapping the pattern, means for adjusting the support so as to properly locate the support in respect to the flask, and means for lowering the flask clear of the pattern board to draw the flask.

mounted loosely on the levers and having 'two bearing points, with means for locking the levers in position after the frame has been adjusted to the flask.

10. The combination in a molding niachine, of a vertically adjustable frame carrying the flask having a bearing point at one end, two weighted levers pivoted to each side of the frame, a cross member loosely supported on the levers, and two supports adjustably mounted on the cross member, one support arranged at right angles to the other support.

l1. The combination in a molding inachine, of means for carrying the pattern, a flask, a vertically adjustable flask supporting frame, means for operating said frame to bring it in Contact with the other side of the fl-ask, a supporting stud on one end of the frame, two slotted and weighted levers pivoted to the frame carrying a cross meniber, yadjustable supports mounted thereon, headed spindles extending through the slots of the levers, a piston on one spindle, a cylinder on the other spindle, lever bars engaging the spindle, a spring connecting the 'said lever bars, and means controlling the fluid admitted to the cylinder.

12. The combination in a molding machine, 'of a .frame having standards, a shaft mounted in the standards, a supporting arni or rock-over secured to the shaft and on which the pattern board or match flask is mounted, a ratchet wheel also mounted on the shaft, a double pawl adapted to engage the ratchet wheel, a spring for yieldingly throwing o-ne or both of the pawls into engagement with the ratchet wheel, a cylinder pivoted to the fra-me and having a th@ mogli of said piston being cont0 an Mlm on the said shaft, a vertically ,movablei table, adjustable supports carried by fhg.' table, a hydraulic cylinder lifting th@ tabl* said table being guided 'on the Standards, gli, tEl-Ill, the lOWeI' @11d th@ Said tank being; connected to the hydraulic @linda-wrm all? pressure Ipigpe connected to the upper end pif the tank and a connection befwen Said 'ir pressure pipe and fthe Cylinder., a Valvle for controlling the flow of m1 to and from the cylinder, a valve for Controlling the air to and from the tank,

piston, nected and :a valve lodated in the pipe connecting the uml; with the hydraulic cylinder, whereby the vertically movable table can be held rigidly in the position to which` it is adjusted.

13 The Combination in a molding machine, of two. frames situated side bv side,

each having a Supporting arm or rock-over and each having..it.v .VGI'C/ally adjustable table with a flask, a pattern. SHPPOltGd by both arms or rock-overs, and m1621115, OI' 21C tuating said arms aand tables in unis'Gllg 14. The combination in a table of a molding machine, of a pair of levers hung to the table, a bar carried by said levers on which one portion of the flask rests, a spring for rigidly holding the levers, and aA cylinder and piston for releasing the hold of the spring.

In testimony whereof, I have signed my naine to this specification, in the presence 'of two subscribing witnesses.

y JAMES BARKER.

Witnesses:

WVM. E. SHUPE, WM. A. BARR.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Talents, Washington, I). C. 

